HTPOlSrOMEUriDJi). 



139 



Canada, Toronto, in August (Afr/s7t); ^^hio, Cleveland, in August 

 {Kearfoft) ; two specimens. This species (iramediately distin- 

 guished by the Avholly white hindwings and unspotted thorax) 

 seems, as well as the next, to have been confused by American 

 entomologists with midtij)U)ictella. 



Hyponomeuta semialba, n. sp. 



(S . '22-23 mm. Head white. Palpi white, second joint some- 

 times with blackish line above towards base. Thorax white, with 

 a black dot on each shoulder and four on back. Abdomen white. 

 Forewings elongate, rather narrow, posteriorly dilated, costa gently 

 arched, apex obtuse, termen obliquely rounded; 3 and 4 stalked ; 

 silvory-whito ; about forty to forty-Hve black dots, viz. a row of 

 about six beneath anterior half of costa, a row of about seven 

 beneath this from | to | of costa, about eight irregularly placed 

 in disc and about twelve towards termen, a subraedian row of 

 eight above fold and a subdorsal row of six : cilia white. Hind- 

 wings grey suffused with white on basal half, especially towards 

 tornus ; an elongate hyaline space beneath cell towards base ; 

 cilia Avhite. 



Canada, Toronto, in August (Parish) ; Ohio, Cleveland, in August 

 (Kearfott); two specimens. 



SPILADARCHA, n. g. 



Head smooth : ocelli present ; tongue short. Antenna) |, basal 

 joint moderately elongate, with pecten. Labial palpi moderate, 

 curved, ascending, second joint thickened Avith rough scales ante- 

 riorly, terminal joint shorter than second, somewhat thickened and 

 roughened anteriorly, tolerably pointed. Maxillary paipi very 

 Fhort, tiliform, appressed to tongue. (Posterior tibife broken.) 

 Porewingswith 1 b furcate, 2 from towards angle, 3 and 4 approxi- 

 mated from angle, 7 to apex, 8-10 near together, 11 from middle. 

 Hindwings under 1, elongate-ovate, cilia 1 ; 2-7 remote, tolerably 

 parallel, 4 from angle. 



This interesting form appears to be the ancestor of Hi/j'onometUa, 

 possessing every qualification. 



Spiladarcha derelicta, n. sp. 



2 . 12 mm. Head grey-whitish. Palpi pale grey sprinkled 

 with whitish, upper part of second and most of terminal joint 

 suffused anteriorly with dark grey. Thorax pale grey sprinkled 

 with whitish. Abdomen grey. Porewings elongate, rather narrow, 

 widest behind middle, costa moderately arched, apex obtuse, termen 

 very obliquely rounded ; light grey suffusedly irrorated with 

 whitish, and strewn with irregularly scattered black scales : cilia 



